Hello everyone, after releasing the NDB Object-Relations mapping library some time ago a lot of people suggested that I should include multiple backend support (especially MySQL) and some features of ActiveRecord. Moreover, I saw on the Rails wiki that some people would like to add some NDB features to ActiveRecord (ie the ActiveSchema proposal). Og (ObjectGraph) is a new project that enhances NDB with an ActiveRecord-like domain language. You can find a preview release with docs and an example in the latest Nitro distribution: http://nitro.rubyforge.com A stand-alone version will follow when the API is stabilized. Btw I would like to make Og compatible with Rails too, so if a Rails hacker wants to help he can contact me. have fun, George Moschovitis.